m50 swap not firing

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  • erb326
    Member
    • Jul 2009
    • 55

    #16
    Has the fuel feed line going to the fpr like an idiot switched it now the fpr is to the return line. But still just endlessly cranks and doesnt start

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    • erb326
      Member
      • Jul 2009
      • 55

      #17
      Dont know if it helps. But the cam position sensor is 1.347 k ohms and the crank position sensor is .541 k ohms shouldn't they be the same?

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      • goarmy
        Mod Crazy
        • Nov 2011
        • 622

        #18
        you need to ground the highlighted wire to the passenger side strut tower. Is your fuel rail harness small brown wire grounded in front of the engine?
        Attached Files
        Last edited by goarmy; 07-29-2014, 05:32 PM.

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        • erb326
          Member
          • Jul 2009
          • 55

          #19
          Originally posted by goarmy
          you need to ground the highlighted wire to the passenger side strut tower. Is your fuel rail harness small brown wire grounded in front of the engine?
          Yeah I left that circle wire connected the second wire I put to the power terminal. Yes the ground wire is solid I even took it off to clean the connection just to make sure the bolt wasnt corroded or anything.

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          • erb326
            Member
            • Jul 2009
            • 55

            #20
            Replaced the cam sensor and the crank sensor, when cranking the pump is trying but ignition cuts. Yesterday I was able to endlessly crank the motor, today it tries but immediately stops

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            • goarmy
              Mod Crazy
              • Nov 2011
              • 622

              #21
              engine ground strap on?

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              • erb326
                Member
                • Jul 2009
                • 55

                #22
                Originally posted by goarmy
                engine ground strap on?

                yeah i copied this, went on the driver side frame rail and connected to the mount bolt of the alternator

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                • sweet3
                  Mod Crazy
                  • Oct 2012
                  • 749

                  #23
                  Not so sure if that is the best grounding point. There is another ground point on the opposite side of the car. I put my grounding point going from the passenger side engine mount to the grounding point e30 chassis. Probably doesnt make much of a difference though
                  PNP Adapter Harness Wiring for M52TU, M54, S54, M60, M62, M62TU, S62, M50, S50, M52, S52 & MORE

                  sigpic

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                  • e30rapidic
                    R3VLimited
                    • Oct 2003
                    • 2167

                    #24
                    swap where the cam sensor and crank sensor plug in, they look similar.
                    '87 325ic, powered by S50.

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                    • erb326
                      Member
                      • Jul 2009
                      • 55

                      #25
                      Finally got fed up and ripped out everything related to the auto harness from the x20 looking connection all the way to the computer (which I didnt have). Cranked the engine, took about 20 second before it kicked and ran. Only problem is the revs were running away, youd start the engine and it would shoot to the redline. Turns out the throttle linkage was screwed in all the way making the throttle plate like 1/3 open. Fixed the plate to be where it should, cranks and idles great now. Thanks for everyones help!

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